Brake-beam.



.PATEETBD AUG.. 4, 1998.1

... --.-.-.wwmw'f-Mm 1 -are concerned) may be combined with a povide a construction which lends itself to portions of the compression member to be -made specially strong, and to that end some- `-member upon the com ression member is re- I assembled hold themselves io cked together in- 35 -member, in a simple and practical manner To all whom 'it mai conce-rn:

Be it known t. at I, CHARLES FRANCIS HUN'rooN, a citizen of the United States, residing at Chicago, in the county of Cook and State oflllinois, have invented a certain new and useful Improvement in Brake-Beam`s, of which the following is a specification.

This invention relates to improvements in brake beams,` and it has for its salient objects to provide a construction in which the connections between the tension and compression members are such as to secure maximum strength combined with great simplicit of form; to. provide a construction in W ich a tension member of strap-like crossl sectional form (so far as its terminal portions flanged compression memberin such manner as to -provide a brake beam, the ends of which are extremely thin for a given degree of 'strength and in this respect economize space at points Where comparatively little space is available; to provide a construction in which endwise movement of the ends of the tension sisted by forged shou ders which abut directly againstthe end margins of the flanged member'in such manner as to distribute such stresses over the chief portion of the cross sectional area of the-compression member; to

ing assembled with the greatest facility, and the two'zmain members of which when 'dependently of special fastenings; to provide a constructibn which enables the terminal what heavier than the remaindero the and in general to provide an improvedconstruction of the character referred to. In the drawings-Figure l is a plan View of a brake' beam embodying a preferred form of my invention; Fig. 2 is a iront elevation of the same; Figs. 3 and4 are details of the strut member ofthe beam; Fig. is a sectional view of Ae. fragmentary port1on of one endof the beam taken on line 5-15 of Fig. 6 and showing the inner or front side of the iange compression member and the terminal portion of the tension member lying therein;

ig. 6 is a. horizontal sectionalview 4taken on line 6 6 of Fig. 5 amE looking downwardly;

UNrTn-D STATES PATENT ori-mon..E y Cinemas FRANCIS nUNTooiI, or cnIcAGo, iLLLYoIsf 'l l l "v' .l n

BRAKE-nem l Specification of Letters Patent.

Application ered April 4, 190s. serial m. 425,134.

. i l .ef'iffilz Ufli' the brake shoe head thereon, partsfgf-the la ter not concerned in the presentinvention-.. being broken away: Fig. S is a-pcrspecti\'c vien' of one end of -thetension member Fig` 9 is a cross sectional view taken tlnouglroneo I end ot the compression 'membermid lo`oking. towards the headedend thereof; Fig. 4IOis. u 'lfi cross sectional vien of the,ilungedgompresi sion member `rhicli receives the endsoftllcng tension member. i y' ,M

In the drawings, 1 designatesgs Meli the anged compression member, 2 theater; sion member, 3 the strut member,-=n nd ,Aqu the brake shoe heads mounted upon the;1"e.'.' spective ends of the beam. Y z rV 7'0 .In the preferred construction.shonniftlieaiY.V ilanged member 1 is of Achannelshapecin *Uy cross section, arranged withits bottom sidcfl or main web vertical andat.thea-cal?,Xgitlrxia reference to the direction on which tllczdrzrf t1-:J5 M comes on the beam, and slightly. cambeicd or' bent, as shown clearly in Fig, 1.-`- -a'lllercmnL-:M pression member 2 preferablptakesgthe forni 'of a fiat strap-like bar engaging-'nt it'sicriiter-m a suitable seat 5 in the frontend of-tlie strutgmgg member und extending thence to `.and se.-v l cured to the respective endsof the.compres-k sion member. The end portions of the tension member are, as shown clearly in thedetaileddiguresf 135 9;. made of la width and cross sectional formfaprnei' proximately corresponding] to i the bottom fc; portion of the channel member, andseidfend portions are bent so as to lie iatwise; Within ci the ends of the channel membenforn lengtlrueo corresponding to the Width .of thebrake-shoe b head. Each end of the tension member te'rminates in a headed portion 6 so forged u on said member as to provide :outstanc ing shoulders 7, 8 and 9 on threesidescorrcjpebr-e spending to and adapted toit-squarelysn against the corresponding. end'lportlonsofil: the com ression member.' Tine'lateralorcl3t-l1\ i of the s oulders 7 S and 9. correspfnidsube;S I stantially to the thicknesso the correspond?P .11,00 ing portions of the compression member, di against which they abut, Vso thatfvbclrtllm tension member is in ace in the compression member it has full bearing against the ends of the latter but nevertheless*.permitslzlnr 'the brake. shoe heads to be slipped onltl'lefo-i ends of the-beam Without requiring a largenu'r aperture in the heads than that neccssaryitd. accommodate the compression memberalonnw Fig. 7 is an end elevation ofthe beam and i 'The compression member-send',.tensioflfle f sion. That is to sayj'the cambered compres slight tension.

c shoe heads, I prefer to make the shoulder 8 shown in somewhat exaggerated form at 8 in Fig. .6.

to be noted that the increased thickness' of -side of the head 311 being arranged to lie-fiat Athe brake shoe head taking the form of an -of the tension member, is-*seen clearly in f Figs. Gand 7.

throu h-the assembled parts to hold them in member are preferably assembled under tension member isilexed very slightly beyond its'normal so aste permit the 'headed ends ci" the tension member to engage with the ends of the channel and thereafter remain under a To insure that this slight tension ill hold the parts against separation temporarilyJ pending the: placing of the brake shoe head thereon and securing it in place, or at any time when it is foundnecessary to remove one or the other of the brake of the headed end of the compression member Very slightly undercut or hooked, as

The brake shoe head 4 is provided with a transveise socket or opening 10 which receives the end of the brake beam, the back against the back side of the channel or coinpression niember,and the front wall 12 of inset lug which extendsinto the front side of the channel and rests against the front face A suitable rivet 13 is inserted assem led relation.

It will be noted that those parts of the tension member which lie within the brake shoe heads are made somewhat thicker than the main bodyof the bar. There is a 'two-fold object in this construction, viz: to provide a greater cross sectional strength at the point where the shearing stress between the end of the compression member and the head of the tension member occurs and to provide greater strength at the angle 14 Where. the tension member departs from the compression member and draws across the corner, so to speak,- of the brake shoe head. It is alsoA the end portions of the tension member renders the latter as strong at, the ,point 'where the rivet aperture intersects it as in any other partof itslength. f It is a matter of much importance that a brake beam shall be so constructed that it not only has sutlieient strength to withstand the maximum st rcsses to which it will bc subjected but thatit shall stand thesel enormous stresses when accompanied or caused by repeated shocks and blows. Tha-t is to say, the blows on thestructnre tend to distignre and batter the parts which come into engagementwith each otherand receive the stress of these blows, and it will be secn'that the present construction admirably meets the conditions necessary to withstand such severe duty.

It is to be noted that the width of the front Wall or portion 12 of the bra-ke shoe head member is of such width as to extend outside of a. point transversely opposite the end face of the compression member, as indicatcd'at' AQLgilliSonstruction prevents any tendconnection that the area of engagement of the vshoulders of the `headed portions with the corresponding end faces of the flanged member exceeds in shearing value the tensile or cross sectional. streiwth of the tension member at the points where thesefshearing-810- stressesare greatest'. Another teature of advantage of the construction described is that the ends o' the tension members lie within the. I'ianged member and against the vertical web ot the lat ter, so that the endwise or compression stresses are brought upon the compression"member, precisely in that plane in which its greatest strength. to resist suc-h stresses lies, and in this res ect the construction is distinguished'l from t rose constructions in whichv niilling blocks are interposed between theends of the tension member and compres-sion inember, or in which the construction is such that the ends of the tension member aro set some distance. in front of the main web ofthe com- I pression member7 and hence convert the com' ression stresses into leverage stresses ten ing to buckle or caniber the compression member as a whole.

tion which is important is that the engagement between the tension member and t ie' compression member by means of which the stresses are conveyed from one to the other is a direct contact enga-gement without the interpositionrof 'filling blocks or analogous y mum load is of an inchunder the M. C. B.A

requirements, the importance of' this feature becomes apparent.

iis

It will be Aobvious that vthe details of'constrrttion and arrangement may be somewhat -inodiiicd without departing frointhe spirit of the'inyention.

I claim as my invention:

1. In a-trusscd brake beam, the combina.- tion with a flanged compression member, of a tension member having its end portions brought. alongside the web and flan eporti'ons of the compression member an s110111.-l dered to overlap and engage with the'end surfaces of both tlieweb and ilange portions 130 v `10o'- I Another feature of the present construc.

Vof the compression member, and means clamping said members together at their ends. I

. A2. Ina trussed brake beam the combination of a compression member having a vertical web and aforwardly directed flange, aA tension member having its end oruons brought alongside of the web and ange ofA said compresslon member and provided with terminal heads, the shoulders whereof overlap and engage the end surfaces of both the web andvlange of the compression member,

and means clamping said members together at their said ends. Y Y

3. ln a trussed brake beam, the combination with a flanged compression 'member of channel-shape'in cross section, of a tension member having end portions approximately Conforming to and lymg within the end portions oi said compression member and provided at its ends with terminal heads laterally enlarged on three sides to overlap and engage the end surfaces of the channel web head mounted u on each end of the brake beam and unite `thereto to clamp the compression and tension members together. i

4. In a'trussed braliejbeam, the combination with a flanged compression member having a vertical web and upper and lower forwardly projecting margine flanges, of a tension'member or truss having strap-like,`

end portions brought alongside of and in contact with the face of the web and between the flanges of the compression member and proand the two flanges thereof, and a brake shoe l vided with terminal headsenlarged'to form` laterally extending approximately right angled shoulders arranged to overlap and directly engage the end surfaces of lthe web l andthe said langes of the eornpressionmember, a brake shoe head a. artmjed and itted upon each end of the bra e beam and hav-- ing front and rear Walls'embraeing the juxtaposed parts of the compression and tension members, and means' connnmg each brake shoe head against endwise movement upon the beam- In a trussed brake beam, tb: eombina` tion of a eompressionmember havin a vertical Web and one or moreforrrm'dly4 irected flanges upon said web, a tension member having its endy ortions brerrght alongside ofV the web and ange or langes of said comressien member and provided with terminal eafs,` the shoulders whereof averla and engage tbe end surfaces of beth thewe and 'lange or ilanges ai the compression member,

and means clamping said members together at their ends comprising e. elamp` D' member -at each end arranged to rest direct y against the front face or surface o the juxtaposed beam members and etendm at its outer edge beyond the end surface o? the compression member against which the shoulders 'of the tension member engage` smears renters aurions.

v Witnesses: i Y g ALBERT H. Gnans,

Emile Reiss.. 

